Instruction manual

MERLIN LEGEND/MAGIX toll fraud
Issue 9 May 2003
6-15
Protecting remote call forwarding
The Remote Call Forwarding feature allows a customer to forward an incoming
call to another off-premises number. However, a caller could stay on the line and
receive another dial tone. At this point, the caller could initiate another toll call.
The following security measures assist you in managing the Remote Call
Forwarding feature to help prevent unauthorized use:
■ Provide the Remote Call Forwarding capability only to those people who
need it.
■ Do not use this feature with loop-start lines. Due to unreliable disconnects
from the carrier’s central office, this feature may allow dial-tone to be
re-established and additional calls to be made.
MERLIN LEGEND/MAGIX toll fraud
Why toll fraud happens
1
99.9% of toll fraud is committed from the outside. Why? There is no programming
in place to prevent it.
A small percentage of toll fraud is committed from the inside by those who are
employed by the business which is serviced by the Legend/Magix. It is fairly easy
to catch a person who is operating from the inside.
■ Employee making calls from any extension.
■ A forwarded phone to an international phone number. Calls from the
outside will dial an extension number which is forwarding to the outside
phone number. From there the hacker can reach any phone number.
■ A customer’s vendor (for example, a cleaning service) making toll calls.
Tool fraud warning signs
■ Incoming calls to toll-free area codes (800,888,877, etc.) are always busy.
■ Direct inward dialing lines are always busy.
■ Heavy call volume – especially at night and weekends.
■ Unexplained increase in long distance calls.
■ Switchboard operator complaining of frequent hang ups, or touch tone
sounds, when they answer.
1. Published 8/17/00